<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
            <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>
<script>
//1. 导入echarts
import * as echarts from 'echarts'
import _ from 'lodash'
export default{
    data(){
        return{
            // 需要合并的数据
            options: {
                title: {
                    text: '用户来源'
                },
                tooltip: {
                    trigger: 'axis',
                    axisPointer: {
                    type: 'cross',
                    label: {
                        backgroundColor: '#E9EEF3'
                    }
                    }
                },
                grid: {
                    left: '3%',
                    right: '4%',
                    bottom: '3%',
                    containLabel: true
                },
                xAxis: [
                    {
                    boundaryGap: false
                    }
                ],
                yAxis: [
                    {
                    type: 'value'
                    }
                ]
            }
        }
    },
    created(){},
    // 此时页面上的元素已经被渲染完毕了
    async mounted(){
         //3. 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'))
        
         // 指定图表的配置项和数据
        const{data:res} =await this.$http.get('reports/type/1')
        console.log(res)
        if(res.meta.status !==200){
            return this.$message.error('获取折线图数据失败！')
        }
        // 4.准备数据和配置项
       const result= _.merge(res.data, this.options)
        //   5.展示数据
        myChart.setOption(result)
    },
    methods:{

    }
}
</script>
<style lang="less" scoped>

</style>
